Jeb Brookshire wrote:
understood. Part of the reason I am doing this is that I need an alignment. Ever since the shocks have gone on the front end is off. I usually have to have the steering wheel slightly turned to keep the car straight. That wasn't an issue before. So I figured in light of that, I could kill two birds with one stone and get an alignment that would not kill tires on the street and maybe benefit the car's handling when autocrossing.
Hey Jeb, for whatever it's worth. I've found over the years that it's not camber, it's toe that kills tires on the street. Especially if you're autocrossing on the same tires you drive around on (it's an STS car right?), you'll kill the tires autocrossing before the alignment will be a problem.
[opinion]
As some of the others have said, I don't know Mazda 3s at all. But when setting up my old Integra when it was "Stock-ish" (lowering springs, Konis, large rear bar) I ran whatever camber that netted me (2.5 degrees or thereabouts), and a little toe out all the way around. Maybe 1/16 front and 1/8 rear. I always set that car up to be as loose as I could make it. Fast FWD cars you want them to be impossibly, evil loose at turn in. That way at or before the apex you can be full throttle and the car will still turn. And, it *forces* you to be on the throttle a lot, which is always good.
Do note that setting the car up to be evil like this can make transitions a little, um, "interesting" if you don't have a strong set of dampers on the car. It'll very quickly start to "oscillate" and pendelum back and forth some, and if you catch it, good for you. But you probably won't. Ask Scott about what my old Integra was like to autocross...
[/opinion]
That's just me though, and I'm not much of a setup guy. I do seem to take to oversteering cars though - the Integra was well known for being evil, and the S2000 can certainly catch you out if you're cornering and the cam timing changes mid corner.